That’s not the point.
If this device was primarily intended for a university or advanced high-school curricula, (and shipped with Raspbian for Robots as the default O/S), I would be in total agreement with you. In fact, this issue wouldn’t even arise as the Raspbian for Robots environment is specifically intended for the more advanced, (or adventurous!), user and has the capabilities to do a lot of things that DexterOS can’t even imagine in its nightmares!
Additionally, configuring an internet connection that has two different bindings with two different networks is not always a trivial task, depending on your experience and the operating system you’re using. It might be simple for you and I, but I’ll guarantee that the typical run-of-the-mill computer user - even if interested in programming and robotics - may not find it that easy a task.
DexterOS, and the whole Bloxter/JupyterLab thing is about making things easy for the first-time robotics user. Or the person trying to teach relatively difficult programming concepts to rank beginners, using a cute but capable robot like the GoPiGo, to give the dry theory some substance in reality. (And add a touch of fun at the same time.)
It is important for us to remember that the DexterOS environment is designed for someone who:
May not have any experience with robots OR programming.
This might just be his first major project.
Just because he may know something about programming or robots, doesn’t mean he’s an expert at networking.
If he’s a teacher in a primary or secondary school, it’s better than an even-money bet that the superintendent/principal grabbed a teacher simply because he had room in his schedule, (maybe even some poor, technically clueless, sod teaching Home Economics, or Phys-Ed), tossed the kits at him, and told him he’s got two weeks to prepare to teach classes on the topic!
(Note the plural “classes”. I’m not joking. This happens all the time.)
Within this particular context - DexterOS. Bloxter and Jupyter - this is the kind of thing that needs to be reported by the user community and addressed by the relevant parties at Dexter.